/**
 * @param {string} s
 * @return {number}
 */
var findTheLongestBalancedSubstring = function (s) {
  let len = 0
  let zeroCount = 0, oneCount = 0
  let left=0,right
  while (s[left]==1) {
    left++
  }
  for(right=left;right<s.length;right++){

  }
};